Theodore Wafer was sentenced this week to at least 17 years in prison for the so-called "porch shooting" of an unarmed teenager who banged on the door of his Detroit home in the middle of the night last year.

Wafer was convicted of second-degree murder in the Nov. 2 death of Renisha McBride, 19, according to The Associated Press. Before getting his sentence, the Dearborn Heights man apologized to McBride's family, saying he killed a woman who was "too young to leave this world."

"I will carry that guilt and sorrow forever," said Wafer, often pausing to control his emotions.

Wafer was convicted last month after a nine-day trial that centered on whether the 55-year-old had a reasonable and honest belief that his safety was in peril. He testified that he was awakened by pounding on his doors and shot McBride because he feared for his life. But a jury rejected his claim of self-defense.

Prosecutors recommended at least 17 years in prison for Wafer, including two years for unlawful use of a gun. Defense attorney Cheryl Carpenter asked for as few as six years in prison.

Noting Wafer's age, Carpenter said at the hearing Wednesday that anything more than 10 years in prison would be a "life sentence."

No one knows why McBride ended up at Wafer's home about 4:30 a.m., though prosecutors speculated she may have been seeking help. She had crashed her car into a parked car about a half-mile away in Detroit around 1 a.m. An autopsy found she was extremely drunk.

Wafer opened the front door and shot McBride in the face, firing through a screen door. He first suggested to police that it was an accident but later admitted to intentionally pulling the trigger.

The jury convicted Wafer of murder, manslaughter, and a gun-related charge on Aug. 7. He will be eligible for parole after serving the minimum sentence.

Wafer is white and McBride was black, and some wondered in the aftermath of the shooting whether race may have been a factor, likening it to the shooting of Florida teenager Trayvon Martin.

Theodore Wafer was sentenced this week to at least 17 years in prison for the so-called "porch shooting" of an unarmed teenager who banged on the door of his Detroit home in the middle of the night last year.